I had some 30 year old 410 cartriges, the only problem I had was they were the old cardboard case ones and the cardboard had swollen slightly making them tight to get into the chamber, still killed bunnies in the garden though!!
Ah Alphamax, I still have a good few left from years ago when doing the fox drivesMy reloads use 20 year old Noble 80 powder and i have a box an half of old Alphamax as M/j says they still go bang ,loverly green flame too
They'll be fine. If they did get a little damp at any stage, most likely leave some unburnt powderHa,Long as they've been kept dry, no problem.
I've a small cartridge bag of ancient Baikal cartridges, God knows they must be from the early eighties, occasional one goes through the Benelli and into a crow.
I used them, a bang like a clap of thunder, a belch of flame a yard long, cloud of debris, a stench of burnt powder and shoulder wrenching recoil.I've owned two, three Baikal guns. Nothing wrong with them. Except the ejectors were never really correctly timed. But I never had the courage to use their Rekord cartridges. These were the ones with a running hare on them?